NUMERICAL SIMULATION OF TURBOEXPANDER ON ORGANIC RANKINE CYCLE WITH DIFFERENT WORKING FLUIDS
Renewable energy is an alternative to overcome the energy crisis and dependence on fossilfueled energy that has an environmental impact due to the greenhouse effect. Meanwhile, disadvantage of EBT is dependent on wheather periodically. Geothermal is a source of EBT that does not depend on wheather....
Saved in:
| Main Author: | |
|---|---|
| Format: | Theses |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/21750 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | Renewable energy is an alternative to overcome the energy crisis and dependence on fossilfueled energy that has an environmental impact due to the greenhouse effect. Meanwhile, disadvantage of EBT is dependent on wheather periodically. Geothermal is a source of EBT that does not depend on wheather. Geothermal resources dominated by water (brine) can not be directly utilized to power generation, but separated by separator into water and steam phase. Then the water phase is reinjected into the injection well. The high potential of energy owned by brine can still be utilized due to development of Organic Rankine Cycle. ORC uses organic refrigerant fluids or hydrocarbons as its working fluid because it has low boiling temperatures. The simulation was analyzed using CFD ANSYS CFX using turbulence model K-epsilon and fluid model Redlich Kwong with Pentane, R245fa, and butane as dry refrigerant with expansion ratio 5:1 and rotational speed variation at 2000 until 14000 rpm. The CFD simulation results show that turboekspander with Butane can generate the highest power of 8,24 kW with 53,5% efficiency at 14000 rpm, while pentane can generate power of 3,71 kW with 44,23% efficiency at 12000 rpm and working fluid R245fa can generate 7,4 kW with efficiency 33,08% at 10000 rpm. <br />
<br />
|
|---|